Sorry for my English :-)Hello,Here is a short summary over 2 years tinkering at a HHO Heating. The "greatest success" bez. Efficiency I have with the "Sudi1" and "Sudi2". The structure is shown at the end of the video and is "free" for ALL people to rebuild Building.The important thing is the "heat" of Catalytic combustion in the burner (heart Round cylinder) to bring in and to pass through a heavy-walled pipe (aluminum / copper) to the heat exchanger. The ignition of the HHO gas in Sudi2 startup is done with a glow plug model aircraft engine or flame. The trick with the condensation, there is the side of the burner head in the aluminum tube a hole to the water route from.The liquid in the glass tube is aqua regia with a sheet, "platinum".IMPORTANT The quartz sand has a grain size up to "maximum 1mm".The test: immersion heater against HHO heating goes in favor of the immersion heater (unfortunately). This means that we MUST improve the HHO gas production and then the balance is very different.Best regards Martin